Hollow steel is a material featuring a hollow, square, or rectangular cross-section. It is frequently used in various construction and fabrication applications, including fences, canopies, partitions, furniture, building frameworks, and handrails, thanks to its practicality, neat appearance, and availability in a wide range of sizes and thicknesses. There are three types of hollow steel: black hollow steel, galvanized hollow steel, and galvalume hollow steel. Galvanized steel features a protective coating that enhances corrosion resistance, whereas black hollow steel is the most commonly used type in construction and fabrication. Galvalume hollow steel, which has a higher aluminum content, offers superior rust and heat resistance and includes an anti-rust coating, making it easier to maintain—an ideal choice for professionals. The selection of the specific type of hollow steel should be based on the installation site, environmental conditions, finishing requirements, and project specifications. The anti-rust coating present on these sections simplifies maintenance. CV Dua Putra Petir offers a variety of sizes and thicknesses. Available sizes include 20×20 mm, 30×30 mm, 40×40 mm, 50×50 mm, 50×100 mm, 60×60 mm, 75×75 mm, and 100×100 mm. Various size combinations are available for rectangular hollow sections, depending on the type, brand, and stock. Thicknesses range from 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 2.0 mm, and 2.3 mm to 3.0 mm. Additionally, product thickness and tolerance levels vary according to the manufacturer and product standards. Hollow steel sections typically come in six-meter lengths, though longer structures can be created by welding them together. Details such as the type, size, thickness, length, and quantity of bars can be submitted to facilitate the purchasing process. For instance, consider a hollow section measuring 50x100 mm with a wall thickness of 2.3 mm and a length of 50 mm. Manufacturers often specify sizes such as 40x60x1.2 mm, indicating an external cross-sectional dimension of 40x60 mm and a nominal wall thickness of 1.2 mm. Consumers should carefully check product specifications—including straightness, surface quality, dimensions, weld seams, and the condition of the bars—before purchasing, and ensure the items match their order. Since all CV Dua Putra Petir products are SNI-certified, consumers can request documentation or certificates verifying the authenticity and standardization of the products, including hollow sections. Hollow sections should be stored in a relatively dry area and kept off the ground to avoid direct contact with the soil. In addition to hollow sections, we supply a wide range of other materials, such as WF beams, H-beams, UNP and CNP channels, angle bars, wire mesh, steel plates, Bondek, BRC fencing and posts, pipes, concertina wire, barbed wire, grating, stainless steel, and geotextiles.